Instrument with sealing device and methods of advancing fluid therethrough

ABSTRACT

Embodiments of the invention include a medical instrument with a sealing device. In embodiments, the medical instrument is endoscopic device having a seal between an elongate shaft member and/or on a portion of a handle to, for example, prevent flow communication between a lumen of the elongate member and the external environment.

This is a continuation of application Ser. No. 10/831,760, filed Apr.26, 2004, now U.S. Pat. No. 8,231,652 issued on Jul. 31, 2012, which isincorporated herein by reference.

FIELD OF THE INVENTION

Embodiments of the invention include a medical instrument with a sealingdevice. In embodiments, the medical instrument is an endoscopic devicehaving a seal between an elongate shaft member and/or on a portion of ahandle to, for example, prevent flow communication between a lumen ofthe elongate member and the external environment.

BACKGROUND OF THE INVENTION

Various medical instruments may be used in connection with an endoscopefor performing a number of operations at a site deep within a patient'sbody cavity. One such instrument, a biopsy forceps device, samplestissue from a body cavity with minimal intervention and discomfort topatients. Typically, a biopsy forceps device, like other endoscopicinstruments, has a long flexible tubular member for insertion into alumen of an endoscope. The tubular member is sufficiently long andflexible to follow a long, winding path of the body cavity. An endeffector assembly, such as a biopsy forceps assembly, is attached at adistal end of the tubular member, and a handle is attached at a proximalend of the tubular member. The handle may have an elongate portion and aspool portion disposed around the elongate portion. The spool portionmay be configured to move longitudinally relative to the elongateportion. An elongate mechanism, such as pull wires, extend through thetubular member to connect the end effector assembly to a hypotube. Thehypotube is then connected to a portion of the handle, such as the spoolportion. Longitudinal movement of the spool portion relative to theelongate portion of the handle causes the elongate mechanism to movelongitudinally in the tubular member, which in turn causes the actuationof the end effector assembly.

In methods of using the biopsy forceps device, an endoscope is placed ina patient's body cavity adjacent to a tissue site from which theacquisition of a tissue sample is desired. The biopsy forceps device isthen advanced to the tissue site via a working channel of the endoscope.Once the biopsy forceps device is next to the portion of the tissue fromwhich the acquisition of a tissue sample is desired, the spool portionis moved relative to the elongate portion so as to move the hypotube andthe pull wires. The movement of the hypotube and the pull wires causesthe jaws of the biopsy forceps assembly to open. The open jaws are thenadvanced to the tissue site, and the spool portion is again movedrelative to the elongate portion so as to move the hypotube and the pullwires such that the jaws close. The closing of the jaws causes a tissuesample to be lodged in the end effector assembly. The biopsy forcepsdevice is then removed from the body cavity via the working channel ofthe endoscope.

During various endoscopic procedures, including biopsy procedures, thebody cavity, such as the colon, may be insufflated to, for example,widen the organ so that the physician has a better view of the tissuesite and/or the body cavity. Insufflation may be accomplished by forcingair into the body cavity, for example, before, during, or afteradvancing the biopsy forceps device into the endoscope and into the bodycavity.

An endoscope typically includes appropriate seals to prevent the escapeof the insufflated air out of the body cavity and to the externalenvironment via the endoscope. In some cases, however, some of the airforced into the body cavity during insufflation escapes into the outsideenvironment via the end effector assembly, the lumen of the elongateshaft member, and the handle assembly. This escape of air hinders theinsufflation and the maintenance of the internal organ pressure. Inaddition, it can result in undesirable spraying of air or other gas orliquid into the operating room and onto those performing the procedure.

SUMMARY OF THE INVENTION

In accordance with the invention, an embodiment of the inventionincludes a medical device including a handle portion, an end effectorassembly, an elongate member connecting the handle portion to the endeffector assembly, and a sealing device associated with at least one ofthe handle portion and the elongate member to substantially prevent flowcommunication between a lumen of the elongate member and an environmentexternal to the device.

Another embodiment of the invention includes a medical device includinga handle portion, an elongate member extending from the handle portion,and a sealing device associated with at least one of the handle portionand the elongate member to substantially prevent flow communicationbetween a lumen of the elongate member and an environment external tothe device.

A further embodiment of the invention includes a method of advancingfluid through a medical device. The method includes providing a medicaldevice having a handle portion, an elongate member extending from thehandle portion, and a sealing device associated with at least one of thehandle portion and the elongate member to substantially prevent flowcommunication between a lumen of the elongate member and an environmentexternal to the device, and bypassing the sealing device to advancefluid through the lumen of elongate member.

In various embodiments. The invention may include additional features.For example, the handle portion may include a tube in flow communicationwith the elongate member. In another example, the sealing device may beconfigured to substantially prevent fluid flow through a gap between thetube and the elongate member. In a further example, the tube may beconfigured to be in flow communication with the environment external tothe device via a proximal end of the tube. In yet another example, thesealing device may be configured to substantially prevent fluid flowthrough the elongate member. In still another example, a method mayinclude placing a vessel containing fluid into the medical device andinjecting fluid into the medical device.

Additional objects and advantages of the invention will be set forth inpart in the description which follows, and in part will be obvious fromthe description, or may be learned by practice of the invention. Theobjects and advantages of the invention will be realized and attained bymeans of the elements and combinations particularly pointed out in theappended claims.

The foregoing general description and the following detailed descriptionare exemplary and explanatory only and are not restrictive of theinvention, as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute apart of this specification, illustrate embodiments of the invention andtogether with the description, serve to explain the principles of theinvention.

FIG. 1 is a perspective view of an exemplary endoscopic instrument.

FIG. 2 is a cross-sectional schematic view of a proximal portion of anendoscopic instrument.

FIGS. 3 to 13 each is a schematic view of a sealing device of anembodiment of the present invention on an endoscopic instrument.

FIG. 14A is a schematic view of a sealing device of another embodimentof the present invention on the endoscopic instrument.

FIG. 14B is a schematic view of the sealing device of FIG. 14A.

FIG. 14C is an internal view of the sealing device of FIG. 14A.

FIGS. 15A to 18 each is a schematic view of a method of advancing fluidthrough a lumen of a medical instrument according to an embodiment ofthe present invention.

DESCRIPTION OF THE EMBODIMENTS

Reference will now be made in detail to the present exemplaryembodiments of the invention illustrated in the accompanying drawings.Wherever possible, the same reference numbers will be used throughoutthe drawings to refer to the same or like parts.

An exemplary embodiment of an endoscopic instrument 10 is depicted inFIG. 1. The endoscopic instrument 10 includes a handle portion 11 and anend effector assembly 12 connected to each other by a flexible elongatemember 13. Control wires 14, 15 extend between the handle portion 11 andthe end effector assembly 12 via a lumen the flexible elongate member13. The handle portion 11 includes an elongate portion 16 connected atits proximal end to a ring portion 17 and a spool portion 18 slidablydisposed around the elongate portion 16. A part of the handle portion11, for example, the spool portion 18, may be connected to a hypotube 22which in turn may be connected to the control wires 14, 15. The elongatemember 13 may having a coiled portion 153 covered by an outer jacket ora sheath 27 (see FIG. 14A). However, the elongate member 13 may not havea coiled portion 153, and instead may include a single layer tubularmember. The end effector assembly 12 may be any type of assembly, forexample, biopsy forceps jaws as depicted in FIG. 1. The control wires14, 15 may be connected at their distal ends to opposing portions of theend effector assembly 12, and at their proximal ends to a hypotube 22.The hypotube 22 is connected to the spool portion 18. Longitudinalmovement of the spool portion 18 relative to the elongate portion 16causes the actuation of the end effector assembly 12 via the controlwires 14, 15.

An interface between the elongate member 13, elongate portion 16, andspool portion 18 is depicted in FIG. 2. The elongate portion 16 includesa distal hole 19 which receives the proximal portion 20 of the elongatemember 13. Rib portions 21 guide the proximal portion 20 of the elongatemember 13 within the elongate portion 16, and may also fix the elongatemember 13 within the elongate portion 16. The control wires 14, 15extend through the elongate member 13 until they reach the proximalportion 20, and then enter the distal end of a hypotube 22. The hypotube22, with the control wires 14, 15 therein, extends through the centralcavity of the elongate portion 16 until they reach the spool portion 18.The hypotube 22 and control wires 14, 15 then extend through the spoolportion 1 for example in roughly an S-type configuration, so as tosecure the hypotube 22 and the control wires 14, 15 in the spool portion18. The open proximal end 26 of the hypotube 22 may or may not extendthrough the proximal side of the spool portion 18.

The configuration shown in FIG. 2 includes certain leak paths permittingthe passage of air, or other gas or liquid, from the lumen of theelongate member 13 to the external environment. For example, a gap 23may exist between the elongate member 13 and the hypotube 22, forexample, between the inner surface 24 of the elongate member 13 and theouter surface 25 of the hypotube 22. The gap 23 may be large enough toallow the passage of gas and/or fluid therethrough, for example, fromthe end effector assembly 12 via the lumen of elongate member 13 and tothe external environment. Air or other gas or fluid also may passthrough the open proximal end 26 of the hypotube 22 via the lumen of theelongate member 13 and hypotube 22.

Embodiments of the present invention include seals to prevent the escapeof air or other gas or fluid from a medical instrument. For example,FIG. 3 depicts an embodiment of a sealing device configured to prevent(or at least impede) fluid flow through gap 23. The sealing device 40has a proximal portion 42 and a distal portion 41. The distal portion 41is substantially cylindrical and has an inner diameter or circumferenceat surface 43 that is substantially the same as (or slightly less than)the outer diameter or circumference of elongate member at outer surface44, so as to form a substantially fluid tight seal between the surfaces43, 44. The proximal portion 42 has a substantially circularcross-section along its length, and tapers from the distal portion 41until the end 45 of the proximal portion 41 contacts the outer surface25 of the hypotube 22. The end 45 of the proximal portion 42 hassubstantially the same (or slightly less) diameter or circumference asthe outer diameter or circumference of hypotube 22 at surface 25, so asto form a substantially fluid tight seal between end 45 of the proximalportion 42 and the outer surface 25 of the hypotube 22. Accordingly, thesealing device 40 assists in forming a substantially fluid tight sealbetween the elongate member 13 and the hypotube 22, such that no (or atleast a reduced) amount of fluid flows into the central portion 164 ofthe handle elongate portion 16 from either the elongate member 13, thehypotube 22, or the gap 23 between the two.

The sealing device 40, and other sealing devices disclosed herein, maybe formed of flexible silicone, rubber, plastic, or any other materialsuitable to substantially prevent (or at least impede) fluid fromflowing across and/or permeating through it.

FIG. 4 depicts another exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through gap 23.The sealing device 50 has a distal portion 51 and a proximal portion 52that are substantially similar to the distal portion 41 and proximalportion 42 of the sealing device 40 depicted in FIG. 3. In thisembodiment, however, sealing device 50 is held in place between elongateportion 16 and elongate member 13.

More particularly, the inner surface 53 of the distal portion 51 and theouter surface 44 of the elongate member 13 are configured to form asubstantially fluid tight seal, and the end 54 of the proximal portion52 and the outer surface 25 of the hypotube 22 are also configured toform a substantially fluid tight seal. In this embodiment, the outersurface 56 of the sealing device 50 (at least along distal portion 51)interacts with the end portions 55 of the ribs 21 of the elongateportion 16 to assist in holding the sealing device 50 in place. Forexample, the sealing device 50 may be slightly compressed between theend portions 55 of the ribs 21 and outer surface 44 of the elongatemember 13, so as to prevent longitudinal movement of the sealing device50 relative to the elongate member 13 and/or the elongate portion 16.

FIG. 5 depicts another exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through gap 23.The sealing device is substantially an O-ring 60 disposed between theproximal end 62 of the elongate member 13, the outer surface 25 of thehypotube 22, and an inner protrusion 61 of the elongate portion 16. Theinner diameter or circumference of the O-ring 60 is substantially thesame as (or slightly less than) the outer diameter or circumference ofhypotube 22 at surface 25, such that a substantially fluid tight seal isformed between the O-ring 60 and hypotube 22. The O-ring 60 also, atleast when compressed between the proximal end 62 of the elongate member13 and the inner protrusion 61 of the elongate portion 16, forms asubstantially fluid tight seal between the O-ring 60 and the elongatemember 13. However, the O-ring 60 may also form a substantially fluidtight seal with the proximal end 62 of the elongate member 13irrespective of whether the O-ring 60 is contacting the inner protrusion61. A seal may also be formed between the O-ring 60 and the innersurface 262 of the elongate portion 16.

As an alternative to using inner protrusion 61 to anchor O-ring 60against elongate member 13, O-ring 60 may be affixed or otherwisecoupled to member 13 in any suitable manner, such as an adhesive.

FIG. 6 depicts still another exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through gap 23.Grease 70, or any other viscous substance, may be placed in at least aportion of gap 23 between the inner surface 24 of the elongate member 13and the outer surface 25 of the hypotube 22. The grease 70 may preventair or fluid from escaping the elongate member 13 through the gap 23.The grease 70 also allows the sealing of the gap 23 despite anypotential movement of the hypotube 22 relative to the elongate member13, as the grease 70 may be placed along a sufficient portion of the gap23 so that despite movement of the hypotube 22 relative to the elongatemember 13, some grease 70 will still remain in the gap 23.

FIG. 7 depicts a further exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through gap 23.The sealing device 80 includes a distal portion 81 substantially similarto the distal portions 41, 51 set forth above in connection with FIGS. 3and 4. The sealing device 80 also has a bellows portion 82 with an endportion 83 that is substantially similar to the end portions 45, 54described above in connection with FIGS. 3 and 4. The bellows portion 82is configured to connect the distal portion 81 and the end portion 83,and also to allow movement of the hypotube 22 relative to the elongatemember 13, in that the bellows portion 82 will collapse and expand toadapt to longitudinal movement of the hypotube 22 and elongate member 13relative to each other. This allows the distal portion 81 and the endportion 83 to be more securely fastened and/or sealed relative to theelongate member 13 and the hypotube 22, respectively, as the distalportion 81 and the end portion 83 do not need to move relative tosurfaces 44, 25.

In various embodiments, for example of the sealing devices in FIGS. 3and 4, the inner surface of the distal portion and the outer surface ofthe elongate member may slightly interfere with each other such that aseal is formed between the surfaces. However, the inner surface of thedistal portion may also have a circumference or diameter larger than thecircumference or diameter of the outer surface of the elongate member.While in such a state a completely fluid tight seal may not necessarilybe formed, such a configuration is sufficient to substantially impedefluid flow. The end of the proximal portion and the outer surface of thehypotube may also slightly interfere with each other such that a seal isformed between the end and the surface. However, the end of the proximalportion may also have a circumference or diameter slightly larger thanthat of the outer surface of the elongate member. While in such a statea completely fluid tight seal may not necessarily be formed, such aconfiguration is sufficient to substantially impede fluid flow. Thesealing devices may move longitudinally relative to the elongate memberand/or hypotube and still maintain the substantially fluid tight sealedstate.

In various embodiments, the inner surface of the hypotube may surroundthe outer surface of the elongate member, and thus there may be a gapbetween the outer surface of the elongate member and the inner surfaceof the hypotube through which gas or fluid may flow. Accordingly, atleast certain features of the embodiments set forth above may bereversed. For example, grease may be applied to the outer surface of theelongate member and inner surface of the hypotube. In another example,the proximal portion of the sealing device in FIGS. 3, 4, and 7 may besubstantially cylindrical, and the distal portion may taper into an endthat seals against the elongate member. In yet another example, theO-ring may be placed around the outer surface of the elongate member andabut an end of the inner surface of the hypotube. Other variations willbe apparent to those of ordinary skill in the art.

FIG. 8 depicts an exemplary embodiment of a sealing device configured toprevent (or at least impede) fluid flow through the open proximal end 26of hypotube 22. The sealing device 90 is solder or other suitablematerial, for example adhesives, disposed in the proximal end 26 of thehypotube 22. The sealing device 90 fills substantially the entireproximal end 26 and is configured to resist pressure, for example fromthe interior of the hypotube 22, in order to prevent fluid flowtherethrough. The sealing device 90 may also secure the control wires14, 15 in the hypotube 22 and/or prevent their movement longitudinallyrelative to the hypotube 22.

FIG. 9 depicts another exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through the openproximal end 26 of hypotube 22. The sealing device is a cap 100 that issecurely fastened around the proximal end 26 of the hypotube 22. Theinner surface 101 of the cap 100 and the outer surface 25 of thehypotube 22 form a substantially fluid tight seal. The cap 100 andhypotube 22 may fit snugly through a friction fit or other suitablecoupling means, such as adhesive.

FIG. 10 depicts still another exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through the openproximal end 26 of hypotube 22. The sealing device is a plug 110 that issecurely disposed in the proximal end 26 of the hypotube 22. The outersurface 111 of the plug 110 has a substantially circular cross-sectionalong its entire length, and tapers from its proximal end to its distalend. The outer surface 111 is inserted into the proximal end 26 of thehypotube 22 until it forms a substantially fluid tight press fit withthe inner surface 112 of the hypotube 22. In such a configuration, atleast some of the plug 110 may be disposed in the hypotube 22. In otherembodiments, the plug may be non-tapered and/or substantially the entireplug may be configured to fit inside the hypotube 22.

FIG. 11 depicts yet another exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through the openproximal end 26 of hypotube 22. The hypotube 22 has a crimped portion120 at its proximal end 26 configured to prevent fluid flowtherethrough. The crimped portion 120 may also secure the control wires14, 15 in the hypotube 22 so as to substantially prevent longitudinalmovement of the control wires 14 relative to the hypotube 22. Thecrimped portion 120 may be formed by any method known in the art.

FIG. 12 depicts yet another exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through the openproximal end 26 of hypotube 22. Here, the hypotube 22 has a crimpedportion 130 substantially similar to the crimped portion 120 in FIG. 11,except that the crimped portion 130 is folded over, for example, toassist in keeping the crimped portion 130 from unraveling and/or toprovide a tighter seal. The control wires 14, 15 may be secured incrimped portion 130 in substantially the same manner as set forth abovein FIG. 11, or the control wires 14, 15 may fall short and not bedisposed in the crimped portion 130 at all.

FIG. 13 depicts a still further exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through the openproximal end 26 of hypotube 22. The sealing device includes a set screwassembly 140. The set screw assembly 140 has a set screw 141 secured ina housing 142 configured to receive and retain the set screw 141. Thehousing 142 also has a passage 143 through which the hypotube 22 can bepassed through. Once the proximal end 26 of the hypotube 22 is in orextended past the passage 143, the set screw 141 in the housing 142 isscrewed onto the hypotube 22 so as to deform the hypotube 22 so thatfluid cannot flow therethrough. The control wires 14, 15 also may beheld in the hypotube 22 by the set screw assembly 141 in the same manneras the hypotube 22 is held in the passage 143, so that the control wires14, 15 are substantially prevented from shifting longitudinally relativeto the hypotube 22.

FIGS. 14A-14C depict an exemplary embodiment of a sealing deviceconfigured to prevent (or at least impede) fluid flow through theelongate member 13. The sealing device is a plug 150. The plug 150 has aplurality of external threads 151 extending radially outward from itscentral tube 152. The external threads 151 are configured, for example,to screw into the coiled section 153 of the elongate member 13 andengage the depressions in the coiled section 153, i.e. the spacesbetween adjacent coils of the elongate member 13. However, the externalthreads 151 of the plug 150 also may be flexible enough such that theplug 150 can be advanced into the hollow portion of the elongate member13 without screwing or threading. In such a case, during advancement ofthe plug 150, the external threads 151 will bend and, once positioned,will expand between coils in the coiled section 153. A substantiallyfluid tight seal is formed between at least a portion of the outersurface 154 of the plug 150, especially the portion that includes theexternal threads 151, and the inner surface 155 of the coiled section153.

The interior of the plug 150, as depicted in FIG. 14C, has a pluralityof chambers 156 with connecting passages 157. The connecting passages157 have a smaller cross-sectional area than the chambers 156. Theconnecting passages 157 are configured such that the control wires 14,15may pass through them, for example, because the connection passages havea cross-sectional area slightly larger than the combined cross-sectionalareas of the control wires 14, 15. The chambers 156 and the connectingpassages 157 are also configured not to substantially impede thelongitudinal movement of the control wires 14, 15 relative to the plug150 or the elongate member 13. The chambers 156 and connecting passages157 are configured to impede and/or prevent fluid flow through theinterior of the plug 150. For example, air or other fluid that entersthe distal most chamber 156 will contact the proximal wall 158 of thechamber 156 and attempt to pass through more proximal connectingpassages 157 and chambers 156. Accordingly, as the gas or fluid reachesthe proximal end of the plug 150, it will have lost substantiallyvelocity, pressure, and/or momentum it had when entering the distal endof the plug 150. In another example, fluid attempting to enter theproximal end of the plug 150 and exit the distal end of the plug 150will encounter substantially the same effect.

In various embodiments, the sealing devices need not form a completelyfluid tight seal, or even any seal at all, between the components of theendoscopic instrument. Indeed, the sealing devices may simply impede theflow of fluid therethrough, for example, to reduce the velocity,pressure, and/or volume of fluid flowing through the endoscopicinstrument.

In various embodiments, any of the sealing devices may be used on otherportions of the endoscopic instrument, including other portions of thehandle, elongate member, and distal end effector assembly, asappropriate. In various embodiments, different combinations of any ofthe above sealing devices may be used. For example, an endoscopicinstrument may have both a plug 150 within elongate member 13 and grease70 in the gap 23. In other example, the proximal end 26 of the hypotube22 may have both solder 90 and a cap 100. Accordingly, any combinationof the above sealing devices is contemplated. The invention may be usedin conjunction with any medical or non-medical device and with anymedical or non-medical procedure.

Embodiments of the invention also include methods of advancing fluidthrough portions of elongate devices. Fluids that may be advancedthrough portions of elongate devices include cleaning fluids sterilizingfluids, saline solution, water, viscous substances, oils, lubrication,disinfecting fluids, drugs or other medications, visual contrast dyes,X-ray contrast dyes, and any other fluid known in the art. For example,to clean an endoscopic instrument, it may be desirable to pass fluidthrough the instrument, including a lumen of the elongate member forexample. One method includes plugging the end effector assembly into avacuum receptacle and submerging the handle portion into a tank offluid. A vacuum is then pulled on the receptacle and the tank ispressurized. As a result, fluid is forced and/or advanced into the endeffector assembly from the handle portion via the lumen of the elongatemember. Ultrasound vibrations and/or heat may be used to assist in thecleaning of the endoscopic instrument. In endoscopic devices thatinclude seals according to any of the embodiments of the invention,including those described above, however, the seal may hinder thepassage of the fluid. Thus, other methods of passing fluid through theendoscopic device to, for example, clean the device, are required.

In an exemplary embodiment of the method of the present invention, anendoscopic instrument having a sealing device, for example one of thesealing devices set forth above, is provided. Before advancing fluidthrough the endoscopic instrument, the sealing device may be removed,for example, by disassembling at least that portion of the endoscopicinstrument accommodating the sealing device. The endoscopic instrument,without the sealing device, may then have fluid advanced through itusing any method known in the art, for example using the method setforth above, and then the endoscopic instrument may be reassembled.After advancing fluid through the endoscopic instrument, the sealingdevice may or may not be placed back on or within the endoscopicinstrument.

As depicted in FIG. 15A, in another exemplary embodiment of the methodof the present intention, an endoscopic instrument having a sealingdevice, for example one of the sealing devices set forth above, isprovided. An outer covering or jacket 27 on the elongate member 13 is atleast partially peeled back from coiled section 153 of the elongatemember 13. Fluid may then be advanced through the endoscopic instrument10, for example through the peeled, uncovered portions 160 of the coiledsection 153, and into the lumen of the elongate member to the handle 11and/or the end effector assembly 12. By removing the outer covering orjacket 27, the fluid may bypass the sealing devices. Fluid may beinjected into the elongate member lumen between adjacent coils throughany suitable method, including methods described below. If the coiledsection 153 is placed under tension by, for example pulling or bendingthe coiled section, gaps 161 form between adjacent coils of the coiledsection 153, such as the gaps shown in FIG. 15B. These gaps 161 mayassist in the delivery of fluid to the lumen of elongate member 13.After delivery of fluid, jacket 27 may or may not be replaced, asdesired.

In other embodiments, for example as shown in FIG. 15C, the outercovering or jacket 27 may not be removed, but have slits 162 cut thereinso as to allow fluid to flow through the coils of the coiled section153, through any suitable injection method, into the lumen 164 of theelongate member 13. The slits 162 may be cut in portions of the outercovering or jacket 27 or both or either side of the sealing deviceand/or devices so as to facilitate fluid flow around the sealing deviceand/or devices. The fluid may then advance through the elongate memberlumen and to the handle 11, the end effector assembly 12, and/or otherportions of the endoscopic instrument 10. After advancing the fluid, theouter covering 27 or jacket 27 may either be placed back on the coiledsections 153 of the elongate member 13 or may be repaired such thatfluid no longer enters the central hollow portion (lumen) 164 of theelongate member 13 through the coiled section 153, or may be left offthe endoscopic instrument 10.

In a further embodiment of the method of the present invention, anendoscopic instrument having a sealing device, for example one of thesealing devices set forth above, is provided. A needle containing afluid is then used to place the fluid into the device. From there, thefluid may flow through the elongate member, the handle, the end effectorassembly, the sealing device, and/or any other portion of the endoscopicinstrument.

For example, as shown in FIG. 16, a long injection needle 170 may beplaced into the end effector assembly 12 and/or a part of the hollowcentral portion 164 of the elongate member 13. The fluid is theninjected into that portion of the endoscopic instrument, and the fluidmay then flow proximally from there until it reaches the distal end ofthe sealing device. The fluid may also flow distally from there until itreaches the proximal end of the elongate member 13 and/or the endeffector assembly 12. The needle 170 may also be used to remove thefluid from portions of the endoscopic instrument, for example, the fluidthat it or another needle injected into the endoscopic instrument. Theneedle 170 may be removed after its use.

In another example, as shown in FIG. 17, a hypodermic needle 180 may beused to pierce the elongate member 13, for example the outer coveringand/or jacket 27 and/or a coiled portion 153, and the fluid may beinjected into the hollow lumen 164 of the elongate member 13. Dependingon where the fluid is injected in the elongate member 13, for exampleproximal to or distal to the sealing device, the fluid may flow towardthe handle 11, the sealing device, the elongate member 13, and/or theend effector assembly 12.

In yet another example, the hypodermic needle 180 could pierce a portionof the handle 11, (e.g., the elongate portion 16, the spool portion 18,and/or the hypotube 22) and the fluid could then be injected into thathandle portion 11. Depending on where the fluid is injected in thehandle portion 11, for example proximal to or distal to the sealingdevice, the fluid may flow to other portions of the handle 11, thesealing device, the elongate member 13, and/or the end effector assembly12.

In still another example, as shown in FIG. 18, a needle 190 could beused to force fluid around the sealing device, for example the sealingdevice 40 of FIG. 3. The needle 190, however, may be used with anysealing device of the present invention. A needle 190 may be advanced tothe sealing device 40 from any direction, and then the distal end of theneedle 190 could be advanced between the inner surface 43 of the sealingdevice 40 and the outer surface 44 of the elongate member 13. Once pastthe region where the sealing device 40 and the elongate member 13 meet,fluid could be injected into the elongate member 13 on the side of thesealing device 40 opposite the rest of the needle 190, and then fluidcould flow to the elongate member 13, the end effector assembly 12,and/or the handle 11. In a variation of the previous example, the needle190 could also be forced through, as opposed to around; the sealingdevice 40. After interaction with the needle 190, the sealing devices 40may need to be repaired and/or repositioned in the endoscopic instrument10.

In a still further embodiment of the method of the present invention, anendoscopic instrument having a sealing device, for example one of thesealing devices set forth above, is provided. The sealing device maythen be partially removed and/or dislodged from the endoscopicinstrument so as to allow fluid flow through the previously sealedportion. The partial removal and/or dislodging of the sealing device maybe accomplished, for example, by advancing a pin, tweezers, and/or otherlike device, into the sealed portion of the endoscopic instrument andthen manipulating the sealing device with the pin, tweezers, or device.Once fluid has been advanced through the endoscopic instrument,including the previously sealed portion, the sealing device may eitherbe reconfigured such that it once again prevents fluid flow through thatportion of the endoscopic instrument, for example using theaforementioned pin, tweezers, or device, or it may be left as is so asto permit fluid flow therethrough.

In still another embodiment of the method of the present invention, anendoscopic instrument having a sealing device, for example one of thesealing devices set forth above, is provided. At least a portion of theendoscopic instrument is submerged in fluid inside of a sealed chamber.A vacuum may then be used on the sealed chamber to draw at least some ofthe air from the interior of the endoscopic instrument, including theinterior portions adjacent to the sealing device. The chamber then maybe pressurized so as to force fluid into the interior of the endoscopicinstrument, for example, the interior portions of the endoscopicinstrument adjacent to the sealing device from which air was evacuated.The fluid may then be removed from the interior portions of theendoscopic instrument, for example, by using a vacuum, injecting airinto the interior portions, utilizing gravity, or using other forces.

In another embodiment of the method of the present invention, anendoscopic instrument having a sealing device, for example one of thesealing devices set forth above, is provided. A portion of theendoscopic instrument is connected to a pressurized fluid device, forexample a device which expels gas or fluids at high pressure, such thatthe pressurized fluid device is in flow communication with the sealingdevice. The pressurized fluid device may then be used to force a gas orfluid through the endoscopic instrument at sufficiently high pressure to“blow out” and/or damage the sealing device. After the sealing devicehas been blown out or damaged, the endoscopic instrument may beconnected to a fluid device which expels gas or fluids at lowerpressure. This fluid device may be used to advance fluid through the nowunsealed endoscopic instrument. After advancing the fluid, the sealingdevice may be reconstituted on or within the endoscopic instrument, orit may be left off and/or in its damaged state.

In various embodiments, any of the above methods of the presentinvention may be repeated to achieve the desired effect and/or result.In addition, any of the above methods may be used with any of the othermethods so as to achieve the desired effect and/or result. For example,once a sealing device is removed from the endoscopic instrument andfluid has been advanced through the endoscopic instrument, anothersealing device may be placed on the endoscopic instrument. The othersealing device may be of the same type as the previously removed sealingdevice, or it may be of a different type.

In various embodiments, the methods described above are used to advancefluid through the sealed medical instrument by bypassing the sealingdevice. Bypassing may also include advancing fluid up to the sealingdevice without necessarily flowing fluid past the sealing device.

In various embodiments, all aspects of the invention set forth hereinmay be used in conjunction with any medical device, instrument, orprocedure, and/or any non-medical device, instrument, or procedure.Other embodiments of the invention will be apparent to those skilled inthe art from consideration of the specification and practice of theinvention disclosed herein. It is intended that the specification andexamples be considered as exemplary only, with a true scope and spiritof the invention being indicated by the following claims.

What is claimed is:
 1. A medical device, comprising: a handle portion;an end effector assembly; an elongate member disposed between the handleportion and the end effector assembly, the elongate member having acoiled portion; an actuation element disposed between the handle portionand the end effector assembly and radially within the elongate member;and a sealing device disposed along the elongate member adjacent to andradially within the coiled portion, wherein the sealing device includesan interior having a plurality of chambers and at least one connectingpassage disposed between two of the plurality of chambers, and whereinthe cross sectional size of the connecting passage is smaller than thecross sectional size of the plurality of chambers.
 2. The medical deviceof claim 1, wherein the actuation element is further disposed radiallywithin the sealing device.
 3. The medical device of claim 1, wherein thesealing device includes a plurality of threads on an outer surfacethereof.
 4. The medical device of claim 3, wherein the plurality ofthreads mesh with the coiled portion of the elongate member.
 5. Themedical device of claim 1, wherein the plurality of chambers and the atleast one connecting passage, are configured to impede a flow of fluidthrough the interior of the sealing device.
 6. The medical device ofclaim 1, wherein the at least one connecting passage is a plurality ofconnecting passages and each of the plurality of connecting passages isinterposed between two of the plurality of chambers.
 7. The medicaldevice of claim of claim 1, wherein the actuation element is disposedradially within the plurality of chambers and the at least oneconnecting passage.
 8. The medical device of claim 1, wherein theelongate member further includes a sheath radially outward of the coiledportion.
 9. The medical device of claim 1, further including: a hypotubedisposed between the handle and the actuation element and extending atleast partially into the elongate member; and a plug disposed in a gapbetween an outer surface of the hypotube and an inner surface of theelongate member.
 10. A medical device, comprising: a handle portion; anend effector assembly; an elongate member disposed between the handleportion and the end effector assembly, the elongate member having acoiled portion; at least one actuation element disposed between thehandle portion and the end effector assembly and radially within theelongate member; and a sealing device disposed along the elongate memberadjacent to and radially within the coiled portion; wherein the sealingdevice includes an interior having a plurality of chambers and aplurality of passages.
 11. The medical device of claim 10, wherein thecross sectional size of the plurality of connecting passages is smallerthan the cross sectional size of the plurality of chambers.
 12. Themedical device of claim 10, wherein the at least one actuation elementis disposed radially within the plurality of chambers and the pluralityof passages.
 13. The medical device of claim 10, wherein the sealingdevice includes a plurality of threads on an outer surface thereof. 14.The medical device of claim 13, wherein the plurality of threads meshwith the coiled portion of the elongate member.
 15. The medical deviceof claim 10, wherein the elongate member further includes a sheathradially outward of the coiled portion.
 16. The medical device of claim10, further including: a hypotube disposed between the handle and theactuation element and extending at least partially into the elongatemember; and a plug disposed in a gap between an outer surface of thehypotube and an inner surface of the elongate member.
 17. A medicaldevice, comprising: a handle portion; an end effector assembly; anelongate member disposed between the handle portion and the end effectorassembly, the elongate member having a coiled portion; at least oneactuation element disposed between the handle portion and the endeffector assembly and radially within the elongate member; and a sealingdevice disposed along the elongate member adjacent to and radiallywithin the coiled portion; the sealing device including (i) an interiorhaving a plurality of chambers and a plurality of passages and (ii) anexterior having a plurality of threads.
 18. The medical device of claim17, wherein the plurality of threads mesh with the coiled portion of theelongate member.
 19. The medical device of claim 18, further including:a hypotube disposed between the handle and the actuation element andextending at least partially into the elongate member; and a plugdisposed in a gap between an outer surface of the hypotube and an innersurface of the elongate member.